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Mercuric Selenide - HgSe

Classification: Selenide
Atomic numbers: 80 & 34
Atomic weight: 79.57
Melting point (C): >900 est.
Boiling point (C):
Density (g/cm3): 8.19 (8.3-8.47)
Refractive index (n=):
Hardness (Mosh-scratch): 2-3
Crystal structure: Isometric-tetrahedral: (111) tetrahedron
Color (solid): Steel-grey
Cleavage: Octahedral: (111)